Garmin GTR 225 User Manual

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page 6-8
6.4.2.2 Calibrate OBS Resolver Page (GNC Only)
The CALIBRATE OBS RESOLVER page calibrates the OBS resolver. See section 6.5.1 for instructions
on how to calibrate the OBS resolver.
Figure 6-11 Calibrate OBS Resolver Page
6.4.2.3 ARINC 429 Page (GNC Only)
The ARINC 429 page configures the NAV ARINC 429 output on the GNC. Configure the port according
to the connected VOR/ILS indicator. See table 6-7 and table 6-8 for description of the configuration
speeds.
Figure 6-12 ARINC 429 Page
Table 6-7 ARINC 429 Configuration Speed (TX)
Table 6-8 SDI Selections
Selection Description
LO SPEED Standard low-speed ARINC 429 (nominally 12.5 kilobits per second)
HI SPEED High-speed ARINC 429 (nominally 100 kilobits per second)
Selection Description
COMMON Generates all 429 outputs with SDI = 0
VOR/ILS 1
Number 1 (Pilot) VOR/ILS Receiver
TX: Generates all 429 outputs with SDI = 1
VOR/ILS 2
Number 2 (Copilot) VOR/ILS Receiver
TX: Generates all 429 outputs with SDI = 2

Garmin GTR 225 Specifications

General

Input Voltage	11-33 VDC
Operating Voltage	11-33 VDC
Operating Temperature	-20°C to +55°C
Frequency Range	118.000 MHz to 136.975 MHz
Channel Spacing	25 kHz
Transmit Power	10 W
Current Consumption	1.5 A (max transmit)